GNSS reference station data fusion transmission method and device based on one-way optical shutter, and medium

Abstract

This invention discloses a method, device, and medium for GNSS reference station data fusion transmission based on a unidirectional optical shutter. Addressing the problem that the limited number of unidirectional optical shutter ports makes it difficult to support the real-time transmission of large-scale GNSS reference station raw observation data streams, this invention receives data streams from multiple stations concurrently via multiple NTRIPs on the source side. It encapsulates and generates standard internal transmission frames containing unique station codes according to a station coding mapping table, aggregates these frames through a time window to generate fused data blocks, and dynamically maps them to the fusion channel and corresponding optical shutter ports based on station priority, traffic statistics, and optical shutter port load before unidirectional transmission. On the target side, the fused data blocks are parsed at the block level, distributed to the corresponding recovery queues based on unique station codes, and reassembled to restore the independent raw observation data streams of each station. This invention achieves high-density multiplexing transmission and accurate recovery of large-scale reference station data with limited optical shutter ports, reduces hardware costs, and improves transmission reliability and port utilization.

Description

Technical Field

[0001] This invention relates to the field of satellite navigation data transmission and network security isolation technology, and in particular to a large-scale GNSS reference station data fusion transmission scheme suitable for scenarios with limited one-way optical shutter ports. Background Technology

[0002] GNSS reference station networks are widely used in high-precision positioning services, regional spatiotemporal benchmark maintenance, natural resource monitoring, deformation monitoring, geological disaster early warning, and surveying and mapping geographic information production. With the continuous expansion of provincial, regional, and even cross-regional GNSS reference station networks, the number of stations typically reaches hundreds or even thousands. Each reference station usually uses the NTRIP protocol to upload raw observation data in formats such as RTCM to a data center in real time for subsequent differential correction, positioning calculation, quality control, and archiving. In cross-security domain transmission scenarios, to meet boundary protection requirements, a one-way optical shutter is typically used to achieve unidirectional data transmission from the source side to the target side. However, existing one-way optical shutter devices usually have a limited number of physical ports, making it difficult to directly handle the massive real-time raw observation data streams in large-scale GNSS reference station networks.

[0003] In existing technologies, the transmission of multi-station GNSS data across security domains typically employs a one-station-one-channel approach, a group of stations corresponding to a single transmission port, or simple multiplexing. This approach suffers from at least the following problems: a severe mismatch between the number of reference stations and the number of physical ports on the optical gate, resulting in poor system scalability and high hardware investment; the original NTRIP continuous data stream lacks a unified standardization mechanism adapted to unidirectional isolation scenarios, making unambiguous recovery on the target side difficult after mixing; in unidirectional optical gate scenarios, there is no reliable reverse confirmation link, leading to insufficient data integrity assurance; and under conditions of network jitter, packet merging, packet cross-transmission, inconsistent message boundaries, and sudden traffic bursts, the target side struggles to accurately reconstruct data by station and epoch. Summary of the Invention

[0004] To address the challenge of the limited number of unidirectional optical shutter ports making it difficult to support the real-time transmission of large-scale GNSS reference station raw observation data streams, this invention provides a GNSS reference station data fusion transmission method, device, and medium based on a unidirectional optical shutter. The method involves receiving data streams from multiple stations at the source side, encapsulating them into standard internal transmission frames containing unique station codes according to a station coding mapping table, aggregating them through a time window to generate fused data blocks, and dynamically mapping the data to the fusion channel and corresponding optical shutter ports based on station priority, traffic statistics, and port load before unidirectional transmission. At the target side, the fused data blocks are parsed at the block level, distributed to the corresponding recovery queues based on the unique station codes, and reassembled. This achieves high-density multiplexing of multiple data streams and accurate restoration of independent data streams from each station within a limited number of ports.

[0005] According to one aspect of the present invention, a GNSS reference station data fusion transmission method based on a unidirectional optical shutter is provided, comprising: On the source side: Receive raw observation data streams uploaded by multiple GNSS reference stations; according to the station coding mapping table, regularize and encapsulate each reference station data stream to generate a standard internal transmission frame. The standard internal transmission frame includes at least a unique station code, payload length, raw observation data payload, and a check field; aggregate multiple standard internal transmission frames according to a preset time window to generate a fused data block; and dynamically map each reference station data to one or more fusion channels based on station priority, real-time traffic statistics, and optical shutter port load information. Then, map the fusion channels to the corresponding ports of the security isolation optical shutter; transmit the fused data block unidirectionally through the mapped fusion channels and the corresponding ports. On the target side: block-level parsing is performed on the received fused data blocks to extract the standard internal transmission frames, and the base station to which the frame belongs is identified based on the unique station code. The standard internal transmission frames are then distributed to the corresponding station recovery queues according to the station. In each station recovery queue, the data is reassembled to restore the independent original observation data stream of each base station.

[0006] As a further technical solution, the standard internal transmission frame also includes at least one of frame synchronization header, protocol version number, station name encoding, and frame trailer; the fused data block includes at least a block header, number of frames within the block, block-level check field, and block trailer.

[0007] As a further technical solution, for base station data that exceeds the preset priority threshold, at least one of the following methods can be used for transmission: key frame redundancy transmission, header information repetition, or double copy transmission.

[0008] As a further technical solution, the target side also includes: performing format legality verification and epoch integrity checks on the independent original observation data streams of each restored reference station, and outputting the verified data to the downstream business system.

[0009] As a further technical solution, for data that fails the verification, at least one of the following processes is performed: anomaly isolation, defect identification, quality score update, log recording, and alarm output.

[0010] According to one aspect of the present invention, a GNSS reference station data fusion transmission method based on a unidirectional optical shutter is provided, applied to the source side, comprising: Receive raw observation data streams uploaded from multiple GNSS reference stations; Based on the site coding mapping table, each base station data stream is regularized and encapsulated to generate a standard internal transmission frame. The standard internal transmission frame includes at least a unique site code, payload length, original observation data payload, and a check field. Multiple standard internal transmission frames are aggregated according to a preset time window to generate a fused data block. Based on site priority, real-time traffic statistics and optical shutter port load information, the data of each base station is dynamically mapped to one or more fused channels, and then the fused channels are mapped to the corresponding ports of the security isolation optical shutter. The fused data block is sent unidirectionally through the mapped fusion channel and the corresponding port.

[0011] According to one aspect of the present invention, a GNSS reference station data fusion transmission method based on a unidirectional optical shutter is provided, applied to the target side, comprising: Receive fused data blocks from the secure isolation optical shutter; The received fused data blocks are parsed at the block level to extract the standard internal transmission frames. The standard internal transmission frames include at least the site unique code, payload length, original observation data payload, and check field. Based on the unique station code, the reference station to which the standard internal transmission frame belongs is identified, and the standard internal transmission frame is distributed to the corresponding station recovery queue according to the station. In the recovery queues at each site, the data is reassembled to restore the independent original observation data streams of each reference station.

[0012] According to one aspect of the present invention, a GNSS reference station data fusion transmission front-end device based on a unidirectional optical shutter is provided, comprising: Multiple client interfaces are used to receive raw observation data streams uploaded from multiple GNSS reference stations; The standard internal frame encapsulation module is used to regularize and encapsulate each base station data stream according to the station coding mapping table to generate a standard internal transmission frame. The standard internal transmission frame includes at least a unique station code, payload length, original observation data payload, and a check field. The time window fusion module is used to aggregate multiple standard internal transmission frames according to a preset time window to generate fused data blocks; The dynamic channel mapping module is used to dynamically map the data of each base station to one or more converged channels based on site priority, real-time traffic statistics and optical shutter port load information, and then map the converged channels to the corresponding ports of the security isolation optical shutter. The optical gate transmitting interface is used to unidirectionally transmit the fused data block to the security isolation optical gate via the mapped fusion channel and the corresponding port.

[0013] According to one aspect of the present invention, a GNSS reference station data fusion transmission backend device based on a unidirectional optical shutter is provided, comprising: Optical shutter input interface, used to receive fused data blocks from the security isolation optical shutter; The fusion block parsing module is used to perform block-level parsing on the received fusion data blocks and extract the standard internal transmission frames. The standard internal transmission frames include at least a site unique code, payload length, original observation data payload, and a check field. The site recovery module is used to identify the base station to which the site belongs based on the site's unique code, and to distribute the standard internal transmission frames to the corresponding site recovery queues according to the site. The epoch reassembly module is used to reassemble data in the recovery queues of each station to restore the independent original observation data streams of each base station.

[0014] According to one aspect of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements the method described thereon.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: Firstly, by using a unified framing, time window aggregation, and channel mapping mechanism, a large amount of site data can be multiplexed and transmitted in at least a few physical ports, significantly reducing the number of optical shutters deployed and the hardware cost. Secondly, by constructing a standard internal transmission frame and fused data block structure, multi-source continuous data streams are transformed into a unified internal representation adapted to unidirectional isolation scenarios before entering the optical shutter, which facilitates stable parsing and recovery on the target side. Third, through multi-level verification, data format and epoch-level integrity determination can be achieved in a unidirectional light gate environment where reverse confirmation cannot be relied upon; Fourth, through the reverse reduction recovery and anomaly handling mechanism on the target side, problems such as missing blocks, fragmentation, out-of-order, duplication, and missing key observation messages can be detected in a timely manner, thereby improving the access compatibility of downstream business systems and the overall operation and maintenance visibility. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the overall process of the GNSS reference station data fusion and transmission method based on a one-way optical shutter provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the source-side and target-side system structure provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the standard internal transmission frame and fused data block structure provided in an embodiment of the present invention; Figure 4This is a schematic diagram of the target-side recovery and verification process provided in an embodiment of the present invention. Detailed Implementation

[0018] To address the problems existing in current technologies, it is necessary to propose a new large-scale GNSS reference station data fusion and transmission scheme to achieve high-density multiplexing and transmission of real-time raw observation data from multiple stations, accurate post-gate recovery, and multi-level data quality verification under limited optical shutter ports. To this end, this invention provides a scheme that establishes a multi-NTRIP concurrent access and site session state management mechanism on the source side, performs unified regularization and encapsulation on the raw observation data streams of each reference station, forming standard internal transmission frames adapted to unidirectional optical shutter scenarios; through time window aggregation and dynamic channel mapping, hundreds to thousands of reference station data streams are high-density multiplexed onto a limited number of optical shutter physical ports; on the target side, through block-level parsing, frame-level extraction, site-level recovery, and epoch-level reassembly, accurate restoration of the independent raw observation data streams of each station is achieved, and data quality is ensured through format validity verification and epoch integrity checks.

[0019] The terms “comprising” and “having”, and any variations thereof, in the specification, claims, and accompanying drawings of this invention are intended to cover a non-exclusive inclusion, such as a process, method, system, product, or apparatus that includes a series of steps or units, not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. In addition, the technical features of the various embodiments or individual embodiments provided by the present invention can be arbitrarily combined to form new technical solutions. Such combinations are not bound by the order of steps and / or structural composition patterns, but must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0021] This invention provides a GNSS reference station data fusion transmission method based on a one-way optical shutter, which solves the technical problem that the limited number of one-way optical shutter ports makes it difficult to carry the real-time transmission of large-scale GNSS reference station raw observation data streams. It achieves the effect of high-density multiplexing and transmission of hundreds to thousands of reference station data streams under limited port conditions, and accurately restores the independent raw observation data streams of each station on the target side.

[0022] See Figure 1 and Figure 2 The method includes the following steps: On the source side, raw observation data streams uploaded by multiple GNSS reference stations are received through multi-NTRIP concurrent access, and site session status information corresponding to each reference station is established.

[0023] Specifically, the source side deploys a multi-NTRIP concurrent access service. This service acts as multiple NTRIP (Networked Transport of RTCM via Internet Protocol) clients, establishing data reception sessions with each GNSS reference station or its upstream aggregation node. Each session corresponds to a site session status object, used to record information such as site mount point identifier, connection status, most recent reception time, average code rate, message type statistics, site priority, and current fusion channel number. The source side also maintains a site whitelist and a site code mapping table. The site whitelist limits the set of sites allowed to access and participate in fusion transmission, while the site code mapping table establishes the correspondence between site names and unique site codes.

[0024] When the raw observation data arrives at any station, the byte stream received by the underlying network is not directly sent to the optical shutter. Instead, the standard internal frame encapsulation module performs unified regularization and encapsulation. Preferably, see [reference needed]. Figure 3 The standard internal transmission frame includes at least a frame synchronization header, protocol version number, site unique code, payload length, raw observation data payload, check field and frame trailer. The site unique code adopts a fixed-length machine-readable code to improve the matching efficiency on the target side.

[0025] Then, multiple standard internal transmission frames are aggregated according to a preset time window to generate a fused data block. The preset time window can be a fixed time window or a sliding time window, preferably 50 milliseconds to 1000 milliseconds. All standard internal transmission frames collected within a time window are combined to form one or more fused data blocks. Each fused data block includes a block header, a fused channel number, the number of frames within the block, multiple standard internal transmission frames, a block-level check field, and a block footer. The same fused data block can carry standard internal transmission frames generated by multiple stations within the same time window.

[0026] Next, based on site priority, real-time traffic statistics, and optical shutter port load information, the data from each base station is dynamically mapped to one or more converged channels, and then the converged channels are mapped to the corresponding ports of the security isolation optical shutter. To fully utilize the limited optical shutter ports and avoid overloading a single port, a two-level mapping mechanism is adopted: the first level is the mapping from site traffic to the converged channel, and the second level is the mapping from the converged channel to the physical port of the optical shutter. The dynamic channel mapping module dynamically determines which converged channel a site should be assigned to based on parameters such as the average bit rate of the site, the amount of data arriving in the most recent time window, site priority, physical port bandwidth threshold, port buffer level, and area affiliation information, and further determines which physical port of the optical shutter the corresponding converged channel outputs through. Through this mechanism, with a fixed number of physical ports of the optical shutter, concurrent transmission of sites can be supported at a level far exceeding the number of ports.

[0027] For base station data exceeding a preset priority threshold, redundant keyframe transmission, repeated header information attachment, or dual-copy transmission can be employed to improve the recovery probability of critical data under unidirectional transmission conditions. The fused data block is then transmitted unidirectionally to the target side via the mapped fusion channel and the corresponding port. The secure isolation shutter, according to a preset security strategy, only allows data to flow unidirectionally from the source side to the target side, without establishing a reverse communication link from the target side to the source side.

[0028] See Figure 4 On the target side, the received fused data blocks are parsed at the block level to extract the standard internal transmission frames.

[0029] Specifically, the fusion block parsing module performs block-level parsing on the fusion data block according to the site code. After the block-level verification is passed, the standard internal transmission frames within the block are extracted frame by frame. The site-level recovery module identifies the site to which the block belongs based on the site's unique code and distributes it to the corresponding site recovery queue.

[0030] Then, in the recovery queues of each site, the data is reassembled to restore the independent original observation data streams of each base station. In the recovery queue of each site, the epoch reassembly module sorts and reassembles the data of the same epoch at the same site. When all the required fragments are present and in the correct order, the independent original observation data stream of the corresponding base station can be restored. If there are missing fragments, out-of-order fragments, duplicates, or timeouts, the system marks the epoch as abnormal and generates a corresponding abnormal record.

[0031] Finally, the restored independent raw observation data streams from each reference station undergo format validity checks and epoch integrity checks. Data that passes the checks is output to downstream business systems, such as downstream positioning calculation, monitoring and analysis, or storage and archiving systems. Format validity checks include at least one of the following: frame header and trailer validity, length field consistency, protocol version consistency, data type validity, and validation field verification. Epichronous integrity checks include at least one of the following: epoch time continuity, key observation message integrity, and message combination integrity within an epoch. For data that fails the checks, at least one of the following processing steps is performed: anomaly isolation, defect identification, quality score update, log recording, and alarm output.

[0032] The above embodiments, through the synergistic combination of technical features such as multi-NTRIP concurrent access and site session state management, standard internal transmission frame encapsulation, time window aggregation, two-level dynamic channel mapping, unidirectional optical gate transmission, target-side block-level resolution and site recovery queue reassembly, format validity verification and epoch integrity check, solve the technical problem that the limited number of physical ports of the unidirectional optical gate cannot directly carry the concurrent transmission of large-scale GNSS reference station raw observation data streams. It achieves the technical effect of high-density multiplexing and transmission of hundreds to thousands of reference station data under limited port conditions, and realizes unambiguous restoration and quality assurance of independent raw observation data streams of each station in a unidirectional transmission environment without reverse acknowledgment links, thereby improving port utilization and data transmission reliability.

[0033] Based on the same inventive concept as the aforementioned method embodiments, this invention also provides a GNSS reference station data fusion and transmission method based on a unidirectional optical shutter applied to the source side. This method addresses the technical problem of how to efficiently aggregate multiple GNSS reference station data streams on the source side and adapt them for unidirectional optical shutter transmission, achieving the effects of data normalization, fusion, and dynamic port mapping on the source side. (See also...) Figure 1 and Figure 2 The method includes: receiving raw observation data streams uploaded by multiple GNSS reference stations via a multi-NTRIP concurrent access method, and establishing site session state information corresponding to each reference station; regularizing and encapsulating each reference station data stream according to a site coding mapping table to generate a standard internal transmission frame, wherein the standard internal transmission frame includes at least a unique site code, payload length, raw observation data payload, and a check field; aggregating multiple standard internal transmission frames according to a preset time window to generate a fused data block, and dynamically mapping the data of each reference station to one or more fusion channels according to site priority, real-time traffic statistics, and optical gate port load information, and then mapping the fusion channels to the corresponding ports of the security isolation optical gate; and unidirectionally sending the fused data block through the mapped fusion channels and the corresponding ports.

[0034] This embodiment solves the problems of aggregation, normalization and port adaptation of multiple GNSS reference station data from the source side before entering the unidirectional optical shutter by combining technical features such as concurrent access of multiple NTRIPs, site coding mapping encapsulation, time window aggregation, and dynamic two-level mapping based on priority and port load. It achieves the technical effect of transforming massive heterogeneous data streams into unified format fused data blocks and intelligently allocating them to a limited number of optical shutter ports.

[0035] Based on the same inventive concept as the aforementioned method embodiments, this invention also provides a GNSS reference station data fusion transmission method based on a one-way optical shutter applied to the target side. This method addresses the technical problem of how the target side can unambiguously recover the independent original observation data streams of each reference station from the fused data blocks received by the one-way optical shutter, achieving the effect of accurately restoring and verifying data quality at each station level. (See also...) Figure 4 The method includes: receiving a fused data block from a secure isolation light gate; performing block-level parsing on the received fused data block to extract standard internal transmission frames, wherein the standard internal transmission frames include at least a site unique code, a payload length, an original observation data payload, and a check field; identifying the reference station to which the reference station belongs based on the site unique code, and distributing the standard internal transmission frames to the corresponding site recovery queues according to the site; and reassembling the data in each site recovery queue to restore the independent original observation data streams of each reference station.

[0036] This embodiment solves the problem that in a unidirectional transmission environment without a reverse confirmation link, it is impossible to rely on the retransmission mechanism and must be correctly parsed in one go. By combining the technical features of block-level parsing, site-specific code identification, distribution to the recovery queue by site, and epoch reassembly, it achieves the technical effect of accurately recovering the independent original observation data streams of each reference station from the fused data block.

[0037] Based on the same inventive concept as the aforementioned method embodiments, this invention also provides a GNSS reference station data fusion transmission front-end device based on a unidirectional optical shutter, to solve the technical problem of how source-side hardware devices can realize the access, encapsulation, aggregation, and dynamic mapping of multiple GNSS reference station data, achieving the effect of integrating source-side functions in the form of a device. (See also...) Figure 2The front-end device includes: multiple NTRIP client interfaces for receiving raw observation data streams uploaded by multiple GNSS reference stations via concurrent multi-NTRIP access and establishing site session status information corresponding to each reference station; a standard internal frame encapsulation module for regularizing and encapsulating each reference station data stream according to a site coding mapping table to generate a standard internal transmission frame, wherein the standard internal transmission frame includes at least a unique site code, payload length, raw observation data payload, and a check field; a time window fusion module for aggregating multiple standard internal transmission frames according to a preset time window to generate a fused data block; a dynamic channel mapping module for dynamically mapping each reference station data to one or more fusion channels based on site priority, real-time traffic statistics, and optical gate port load information, and then mapping the fusion channels to the corresponding ports of the secure isolation optical gate; and an optical gate transmission interface for unidirectionally transmitting the fused data block to the secure isolation optical gate via the mapped fusion channel and the corresponding port.

[0038] This embodiment solves the integrated requirement of source-side hardware devices to simultaneously handle multiple concurrent data accesses, unified format encapsulation, aggregation, and port mapping by working together through multiple NTRIP client interfaces, standard internal frame encapsulation modules, time window fusion modules, dynamic channel mapping modules, and optical gate transmission interfaces. It achieves the technical effect of solidifying software methods into hardware devices, facilitating deployment and expansion.

[0039] Based on the same inventive concept as the aforementioned method embodiments, this invention also provides a GNSS reference station data fusion transmission backend device based on a unidirectional optical shutter, to solve the technical problem of how target-side hardware devices parse fused data blocks and restore the original observation data stream by station, achieving the effect of integrating target-side functions in the form of a device. See also Figure 2 The backend equipment includes: a shutter input interface for receiving fused data blocks from a secure isolation shutter; a fused block parsing module for performing block-level parsing on the received fused data blocks and extracting standard internal transmission frames, wherein the standard internal transmission frames include at least a site unique code, payload length, original observation data payload, and a check field; a site recovery module for identifying the corresponding reference station based on the site unique code and distributing the standard internal transmission frames to the corresponding site recovery queues; and an epoch reassembly module for reassembling the data in each site recovery queue to restore the independent original observation data streams of each reference station.

[0040] This embodiment solves the hardware implementation problem of efficiently parsing and restoring the original data stream from the fused data block received by the unidirectional optical shutter on the target side by site by means of the cooperation of the optical shutter input interface, the fusion block parsing module, the site recovery module and the epoch reconstruction module. It achieves the technical effects of data recovery accuracy, real-time performance and hardware integration.

[0041] Based on the same inventive concept as the foregoing method embodiments, this invention also provides a computer-readable storage medium for storing a computer program that implements the above methods, thereby facilitating deployment and execution. The storage medium stores a computer program, which, when executed by a processor, implements the steps of any of the above method embodiments. The storage medium includes, but is not limited to, various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory, random access memory, magnetic disks, or optical disks.

[0042] This embodiment solves the problems of method portability and reusability by storing the steps of the above method embodiment in the form of a computer program in a computer-readable storage medium, and achieves the technical effect that the method of the present invention can be executed simply by loading the program in the storage medium onto a general-purpose processor.

[0043] In summary, this invention solves the technical problem of the inability to directly transmit raw observation data streams from large-scale GNSS reference stations across domains in real time under the condition of a limited number of physical ports on a one-way optical shutter. This invention adopts an integrated technical concept of "source-side multi-channel concurrent access and unified framing encapsulation—time window aggregation and two-level dynamic channel mapping—target-side block-level parsing and station-by-site recovery queue reassembly—format validity verification and epoch integrity check," achieving high-density multiplexing transmission of hundreds to thousands of reference station data streams on a limited number of optical shutter ports and unambiguous and accurate restoration of independent raw observation data streams from each station. The implementation of this invention can significantly reduce the number and cost of one-way optical shutter hardware deployments, improve port utilization and transmission reliability for cross-security domain data transmission, support large-scale access and secure aggregation of provincial, regional, and even national GNSS reference station networks, and provide high-quality, traceable data support for downstream business systems such as high-precision positioning, geological disaster monitoring, natural resource surveys, and intelligent transportation, resulting in significant economic and social benefits.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the technical solutions of the embodiments of the present invention.

Claims

1. A GNSS reference station data fusion and transmission method based on a one-way optical shutter, characterized in that, include: On the source side: Receive raw observation data streams uploaded from multiple GNSS reference stations; According to the site coding mapping table, each base station data stream is regularized and encapsulated to generate a standard internal transmission frame. The standard internal transmission frame includes at least a unique site code, payload length, original observation data payload, and a check field. Multiple standard internal transmission frames are aggregated according to a preset time window to generate a fused data block. Based on site priority, real-time traffic statistics, and optical gate port load information, the data from each base station is dynamically mapped to one or more fusion channels. The fusion channels are then mapped to the corresponding ports of the security isolation optical gate. The fused data block is transmitted unidirectionally through the mapped fusion channels and the corresponding ports. On the target side: The received fused data blocks are parsed at the block level, and the standard internal transmission frames are extracted. The base station to which the frame belongs is identified based on the unique station code. The standard internal transmission frames are distributed to the corresponding station recovery queues according to the station. In each station recovery queue, the data is reassembled to restore the independent original observation data stream of each base station.

2. The GNSS reference station data fusion and transmission method based on a unidirectional optical shutter according to claim 1, characterized in that, The standard internal transmission frame also includes at least one of the following: frame synchronization header, protocol version number, station name code, and frame trailer; the fused data block includes at least a block header, number of frames within the block, block-level check field, and block trailer.

3. The GNSS reference station data fusion and transmission method based on a unidirectional optical shutter according to claim 1, characterized in that, For base station data that exceeds the preset priority threshold, at least one of the following methods is used for transmission: key frame redundancy, repeated header information attachment, or double copy transmission.

4. The GNSS reference station data fusion and transmission method based on a unidirectional optical shutter according to claim 1, characterized in that, On the target side, it also includes: performing format validity checks and epoch integrity checks on the independent raw observation data streams of each restored reference station, and outputting the data that passes the checks to the downstream business system.

5. The GNSS reference station data fusion and transmission method based on a unidirectional optical shutter according to claim 4, characterized in that, For data that fails the verification, perform at least one of the following actions: anomaly isolation, defect identification, quality score update, logging, and alarm output.

6. A GNSS reference station data fusion and transmission method based on a one-way optical shutter, applied to the source side, characterized in that, include: Receive raw observation data streams uploaded from multiple GNSS reference stations; Based on the site coding mapping table, each base station data stream is regularized and encapsulated to generate a standard internal transmission frame. The standard internal transmission frame includes at least a unique site code, payload length, original observation data payload, and a check field. Multiple standard internal transmission frames are aggregated according to a preset time window to generate a fused data block. Based on site priority, real-time traffic statistics and optical shutter port load information, the data of each base station is dynamically mapped to one or more fused channels, and then the fused channels are mapped to the corresponding ports of the security isolation optical shutter. The fused data block is sent unidirectionally through the mapped fusion channel and the corresponding port.

7. A GNSS reference station data fusion and transmission method based on a one-way optical shutter, applied to the target side, characterized in that, include: Receive fused data blocks from the secure isolation optical shutter; The received fused data blocks are parsed at the block level to extract the standard internal transmission frames. The standard internal transmission frames include at least the site unique code, payload length, original observation data payload, and check field. Based on the unique station code, the reference station to which the standard internal transmission frame belongs is identified, and the standard internal transmission frame is distributed to the corresponding station recovery queue according to the station. In the recovery queues at each site, the data is reassembled to restore the independent original observation data streams of each reference station.

8. A GNSS reference station data fusion transmission front-end device based on a one-way optical shutter, characterized in that, include: Multiple client interfaces are used to receive raw observation data streams uploaded from multiple GNSS reference stations; The standard internal frame encapsulation module is used to regularize and encapsulate each base station data stream according to the station coding mapping table to generate a standard internal transmission frame. The standard internal transmission frame includes at least a unique station code, payload length, original observation data payload, and a check field. The time window fusion module is used to aggregate multiple standard internal transmission frames according to a preset time window to generate fused data blocks; The dynamic channel mapping module is used to dynamically map the data of each base station to one or more converged channels based on site priority, real-time traffic statistics and optical shutter port load information, and then map the converged channels to the corresponding ports of the security isolation optical shutter. The optical gate transmitting interface is used to unidirectionally transmit the fused data block to the security isolation optical gate via the mapped fusion channel and the corresponding port.

9. A GNSS reference station data fusion transmission back-end device based on a one-way optical shutter, characterized in that, include: Optical shutter input interface, used to receive fused data blocks from the security isolation optical shutter; The fusion block parsing module is used to perform block-level parsing on the received fusion data blocks and extract the standard internal transmission frames. The standard internal transmission frames include at least a site unique code, payload length, original observation data payload, and a check field. The site recovery module is used to identify the base station to which the site belongs based on the site's unique code, and to distribute the standard internal transmission frames to the corresponding site recovery queues according to the site. The epoch reassembly module is used to reassemble data in the recovery queues of each station to restore the independent original observation data streams of each base station.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1 to 7.

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